Approximately what percentage of the US population is made up of individuals under 20?

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Prepare for the MCAT Psychological, Social, and Biological Foundations of Behavior Test. Study with flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

To determine the percentage of individuals under 20 in the US population, we can refer to demographic data. As of recent statistics, individuals aged 19 and under constitute about 24% to 27% of the total population. This aligns closely with the choice representing 25%.

Choosing 25% reflects an understanding that this group makes up roughly a quarter of the population, which is substantiated by census data that track age distribution. This understanding is critical for interpreting social dynamics and policy considerations, as a significant portion of the population being under 20 has implications on education, healthcare, and social services.